Guard for punch presses



Nov. 20 1923.

1,474,366 E. ISCHINGER GUARD FOR PUNCH PRESSES Filed'dune 26 1920INVENTOR M raise ERIC ISGHINGER, OF ROCHESTER, NEW YORK, ASSIGNOR OFONE-HALF TO FRAN KEIPEP OF ROCHESTER, NEVIYORK.

GUARD F03 PUNCH .PRES S ES.

Application filed June 26, 1920; Serial No. 392,054

To all whom it may concern Be it known that 1, E1210 IscHINeER, acitizen of the United States, residing at Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Guards for Punch Presses, of which the following is aspecification.

The object of my invention is to make a new and improved guard for apunch press of the so-called pendulum type and more especially toprovide adjustments for the pivot for said guard so that the pivot maybe adjusted to the right or left and forward and back on the bridge, andthus make it easier to connect the guard with the ram of the press bywhich it is driven, thus making the guard more capable of fitting agreater variety of presses.

Another object of the invention is to improve the details ofconstruction of the guard head.

This and other objects ofmy invention will be fully illustrated in thedrawing, described in the specification and pointed out in the claims atthe end thereof.

In the accompanying drawing:

Fig. 1 15a front elevation of apunch press with the guard attachedthereto.

Fig. 2 is a side elevation of the punch press with the guard shownpartially in section, the section being taken on the line 2 2 of Fig. 1.

Fig. 3 is a detail perspective View of the adjustable pivot block of theguard.

Fig. 4: is a detail perspective view of'the lower part of the adjustablepivot block.

Fig. 5 is a per'spective'view of the solid pivot block of the guard.-

In the several figures of the drawing, like reference numerals indicatelike parts.

Punch presses are constructed in manydifferent sizes which are used.according to the work that is to be done on them. The parts of the punchpresses are proportioned to the size of the presses and in mounting aguard on the frame of the press it has heretofore been necessary to makecertain parts of the guard in different sizes corresponding with thesizes of the presses to which they are to be attached. One dimension ofthe press that has to be'particularly' taken into consideration inmounting the guard on the press is the distance. the ram block; projectsin each case, the pivot block from which the guard swings is madeadjustable horizon-- tally toward and away from the ram block of thepress.

As shown in the drawings, the guard comprises the swinging arm 1 whichis mounted on the adjustable. pivot block 2.

This pivot block is shown made triangular in shape and is made up of thebody member 3, into which the groove 4 is milled, and thetriangular'shaped cover plate 5, which is clamped over the groove 4 bymeans of the cap screws 6, 6, 6.

A bridge member 7, which comprises a bar of cold rolled steel, isadapted to support the pivot block 2 by passing thru the groove 41 sothat the cover plate 5 can be tightly drawn againstthe front face ofthis 7 bridge member and thus clamp the pivot block rigidly in placethereon. The bridge member in turn is supported on either end thereof bythe brackets 8 and 9 which project out from the frame of the press,being held suitably in place thereon by means of cap screws 10, 10. Thebridge member is hinged on the bracket 8 andis mounted to swing on'thepin'll carried in the outer. end of the bracket 8. In the bracket 9 thebridge member engages into the groove 12, in which it is heldin placethe pin 13, which bridges the groove 12in front of the end of the bridgemember. The pivot stud on which the guard arm 1 is mounted to swing iscarriedin the bearing member 1 1. 'Ihisbearing member has a serratedsurfacela that is adapted to engage the serrations provided on thebottom of the pivot block 2. The bearing member is also provided with apair of slots 1.6, 16, thru which suitable cap screws 17, 17, areadapted to pass and screw into the bottom of the pivot block 2, thusclamping the bearingmember rigidly in place thereon;

angle of about 80.

within the range of the adjustment provided by the length of theserrated surface of the bearing block and the slots provided therein.

The guard arm 1 is mountedon a head 18 in which is provided the cam slot19. The roller 20 carried on the roller bracket 21 V is adapted toengage the cam slot 19 so as to 7 rock thehead 18 and in doing so, swingthe guard 1 from the left to the right thru an v The movement of theroller 20 is the same as the movement of the ram block 22 on the pressas the roller bracket 21 is clamped to the ram bracket 23 mounted on theram block 22. Thus, the guard 1 swings to the right in front of the die2% and back again each time the ram block 22 recip-rocates.

The guard 1 has an auxiliary guard member mounted thereon. This guardmember is carried in the back of the guard 1 and projects rearwardlytherefrom. While the guard 1 is intended to swing in front of the die,the guard member 25 is adapted to simultaneously sweep over the die 24before the punch 26, carried by the ram block, makes engagementtherewith. Thus, the

7 front of the die, as well as the top thereof,

is guarded in that the guard sweeps over these parts just prior to theengagement of the punch 26 with the die 24 and moves any part of theoperators handaway from in front and top of the die.

t will be understood that the length of the bridge will be proportionedto the width of thepress and the pivot block 2 will be clamped-in themiddle of the bridge so as to bring it centrally ofthe press. It willalso be understood that the bridge brackets will vary in length so as tosupportthe bridge andthe pivot block at the desired distance in front ofthe ram block andbecause of variationsin the distance that the ram blockprojects out from the frame of the press, it is not necessary to varythe length of the bridgebracket in every case, but it will be sufficientto adjust the bearing member 14 in or out on the block 2 within thelimit permitted so that the cam slot 1.9 in the guard arm 1 can engagethe roller 20 carried by the ram block of the press. This makes itpossible to do away with a large number of the special sizes of bridgebrackets and reduces the sizes that are needed for the various makes ofpresses to a comparatively small number.

In Fig. 5 I have shown the triangular shaped pivot block with thebearing member integral therewith, This form of pivot adapted to swingin front of said punch press, a bridge member supported on said punchpress, a pivot carrying member supported on said bridge member, saidpivot carrying member being adapted to be .ad-

justed on said bridge member at rightangles thereto toward or away fromin front of said punch press, said pivot carrying member having saidpendulum membervmounted to swing thereon, an actuating member carried bysaid punch press and operating said pendulum guard on the operationthereof.

2. In a safety guard for punch presses, the combination of a bridgemember adapted to be supported on the frame of the press, a pivotcarrying member adapted to be clamped in place. on said bridge member, I

said pivot carrying member being adapted to be adjusted along saidbridge member and at right angles thereto towards and away from thefront of the frame of the press, a pendulum guard mounted to swing onsaid pivot carrying member in front, of said press.

said press and being adapted to be clamped to said pivot member, apendulum guard mounted to swing on said bearin member.

4. In a safety guard for punch presses,

the combination of a pendulum member 3. In a safety guard for punchpresses, the

mounted to swing in front of. the frame of the punch press, an auxiliaryguard member mounted on said pendulum member and projecting rearwardlytherefrom, said auxiliary guard memberbeing adapted to sweep over thedie mounted on said punch press in unison with the movement of saidpendulum member. i y I 5.In a safety guard for punch presses, thecombination of a bridge member mounted on the frame of said punch pressand being. adapted to swing with one end thereof toward and away fromthe frame of the punch press, a pivot member carried on said bridgemember, said pivot member being adapted to be adjusted along said bridgeand toward and away. from in front ofthe frame of the press, a pendulummember mounted to swing on said pivot member.

6. In a safety guard for punch presses, the combination of a bridgemember adapted to be supported at the front of on the frame of the punchpress and hinged to swing in and out therefrom, a pivot carrying membercarried on said bridge member and being adapted to be adjusted sidewaysand endways on said bridge member, a guard member adapted to swing onsaid pivot carrying member, means carried on said guard member topositively connect said guard member with the moving part of the punchpress, said positive connection operating to swing said guard member onsaid pivot carrying member.

7 In a safety guard for punch presses, the combination of a bridgemember adapted to be supported on the frame of the punch press, a pivotcarrying member having a groove milled into the face thereof, saidbridge member being adapted to engage into the groove in said pivotmember, a cover plate adapted to be clamped over the groove in saidpivot carrying member to clamp said pivot carrying member rigidly inplace on said bridge member.

8. In a safety guard for punch presses, the combination of a bridgemember supported in front of the ram of the press, a triangular shapedblock having a groove therein adapted to engage the back of the bridge,a triangular shaped plate engaging the front of the bridge, said blockand plate being fastened together and clamping the bridge between them,a boss carried on said block at the side of the bridge and extendingtransversely thereto.

9. In a safety guard for punch presses, the combination of a bridgemember having a hole drilled into it near one end thereof, a supportingbracket, a pivot pin mounted in said bracket near the outer end thereof,said pivot pin being adapted to engage into the hole in said bridgemember, a lock bracket having a groove provided in the front thereof, apin mounted in said lock bracket and closing the open end of saidgroove, the free end of said bridge member being adapted to engage thegroove in said lock bracket, said pin in said lock bracket being adaptedto be held in front of said bridge member to look said bridge member inplace on said lock bracket.

10. In a guard for punch presses having a ram, the combination of abridge member, a guard mounted to swing on said bridge member, anactuating member adjustably mounted on said ram of said punch press tooperate said guard and means to adjust said guard bodily toward or awayfrom said actuating member and means to adjust said guard along saidbridge member, said bridge member being held stationary during theadjustment of said guard thereon.

11. In a guard for punch presses having a ram, the combination of anactuating member carried on said ram of said punch press said actuatingmember comprising a stationary bracket and an adjustable bracket mountedon said stationary bracket, a guard mounted in front of said punch pressand operated by said actuating member and means to adjustably move saidguard and its 1 bearing toward and away from said actuating member.

12. In a guard for punch presses having a ram, the combination of anactuating arm carried on said ram, a bridge member, a guard mounted toswing from said bridge member, said guard having a sliding connectionwith said actuating member to operate said guard on the reciprocation ofsaid ram, and means to adjustably move said guard and its bearing towardor away from said actuating member to keep it in sliding contacttherewith.

13. In a guard for punch presses having a reciprocating ram, a bridgemember mounted in front of said ram, an actuating member comprisin afixed member and an adjustable member mounted on said ram, a

guard mounted on said bridge member, a cam member carried on said guard,said actuating member being adapted to engage with said cam member andmeans to adjust said guard toward or away from said ram to engage saidactuating member into said cam member.

In testimony whereof I affix my signature.

' ERIC ISCHINGER.

